Science Exploration

What is the basic structural and functional unit of all living organisms?

• atom

• cell

• organ

• molecule

In which organelle does photosynthesis occur?

• endoplasmic reticulum

• nucleus

• chloroplasts

• mitochondria

What are the three main layers of the Earth?

• crust, core, atmosphere

• crust, mantle, core

• lithosphere, asthenosphere, mesosphere

• mantle, crust, atmosphere

What is the process by which plants make their food using sunlight?

• Respiration

• Photosynthesis

• Hydroponics

• Chloroplast

Which organelle is known as the powerhouse of the cell?

• Mitochondria

• Endoplasmic reticulum

• Ribosome

• Nucleus

What type of reaction occurs when two or more substances combine to form a new substance?

• Nuclear reaction

• Chemical reaction

• Biological reaction

• Physical reaction

Which layer of the Earth is made up of solid iron and nickel?

• Outer core

• Mantle

• Crust

• Inner core

What is the chemical equation for photosynthesis?

• 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2

• CO2 + H2O + light energy -> CH2O + O2

• 6CO2 + 6H2O -> C6H12O6 + 6O2

• 6CO2 + 6H2O + ATP -> C6H12O6 + 6O2

What is the function of the cell membrane?

• Regulates cell division

• Controls the movement of substances in and out of the cell.

• Provides energy to the cell

• Stores genetic information

What is the role of enzymes in chemical reactions?

• Enzymes have no effect on the rate of chemical reactions.

• Enzymes change the chemical composition of reactants in reactions.

• Enzymes inhibit chemical reactions by increasing activation energy.

• Enzymes increase the rate of chemical reactions by lowering activation energy.